Type-writing machine.



W. F. HELMOND.

TYPE WRITING MACHINE. APPLICATION FILED FEB. 24, 1910.

1,058,672. Patented Apr. 8, 1913.

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. away from the platen in opposition to the WILLIAM r. nnnmdlvn, ornimrro'rtn; comvnc'rrcur, assxenon. romminnwoon".

'r'YrnwnIrEn COMPANY, or'nnw roman. Y;,,A CORPORATION; OF J RSEY."

" mn-wnirmo M HINEE 1,058,672Q H I g V p Application filed a 1'0 all whom it may concern Be it knownthat 1, WILLIAM F. HEL- MoNn, a citizen of the United States, re

- ablemechanism which controls the pressure of the .rolls against the platen.

The rolls are mounted upon forward and rear shafts,-whic h extend along. theplaten and are carried upon'arms, the latter ex- .tending forwardly and rearwardly from the tie-rod which usually extends beneath the platenfit'o connect the endsof the platen frame. There are also provided releasing levers; a key-controlled rock-shaft having cams to operate saidreleasing levers, and the latter working :upon fixed pivots ,and having means to engage all of said Frolicarrying arms, to move them simultane-:-us'ly tension of springs which normally pressthe rolls against the platen.. The springs are improved-in structure and mann'er of a'dvjustment: and the adjustable (lGVlCGS- are readily accessible, and the whole mechanism I sists of an improvement in the paper deflector or apron which curves around the ,jlis placed very compactly upon the. platen .35

frame, and is inexpens ve to manufacture.

Another feature-bf the invention-conunder side of the platen; this being simplified in structure and manner .of mounting; and being constructed to adapt itself readily to the platen or the various thicknesses and sizes of sheets thereon, This paper deflector is normally supported near. its. front edge by means of the front pressure roll shaft.- 1 i Other features and advantages willhereinafter appear. '1

In the accompanying drawings, Figure 1 shows the platen frame of the Underwood type'of writing machine, and the pressure rollmechanism in. inverted position. 7 Fig. 2 is a perspective inverted; fragmentary View. with parts broken away, to. show the devices near one end of the platen for controlling the pressure rolls. is a dc tail of one of the pressure'roll springs and means foradjusting the same. Fig. 4' is a cross section through the platen axle and rpll shafts, showing the parts in normal po-. sitions. Fig. 5 is a yiew'similar to Fig. 4,

but showing'thefrolls',cast Off from the platen. Fig. 6 is.an, in,verted plan of the.

v I Patent'ed'A'pr. 8,1913. ebruary24,1910...;Seria11TO.545,594.

rolls and roll controlling devi'ces near one' end of the platen.

A cylindrical platen 1 is mounted by means of an axle 2 in the ends 3 -of a platen frame, which also comprises a rear paper shelf 4,-which connects .said ends, and a tie rod-5, which also rigidly connects said ends3.,

The rear pressure or feed rolls 6 "are mounted at intervals on a shaft 7, extending alllong the platen, and mounted in arms- 8,

e latter having hubs. 9, whereby, they are piyoted upon the. tie rod or fixed sshaift. Goiled springs 10. are compressed betweenlugs- 11 on the arms 8. and brackets .12, the

latter fixed upon the tie rod 5.- V The-tension Y of eachspring is regulated byfa screw 13, threaded through the; bracket 12 and press.-

ir. a collar, cup or washer 14 dwn upon'the' spy-11g. The screw may be retained .by a sprin finger 15 held between the collar 14 tindtli'e bracket 12-. As seen in Fig. 3, one end of the spring may be seated in the cup, and the screw may have a point to fit in a depression 16, to hold the cup against displacement.

The forward rolls 17 are mounted in 'a .manner somewhat similar to the rear rolls;

'saidrolls 17 being carried upon a shaft-18,

the latter mounted in arm's'19 extending forwardly from-the tie rod 5, upon which they are'hinged. Compression springs 20 work between bracket arms'21 fixed upon the tie- -rod 5, and lugs 22 formed upon the arms .19; screws 23 being threaded through said lugs22 and havingthe same-construction I and operation as screws 13. i

All of the springs 2111(l tl11l regulating I devices may be-placed on .one side'of the tie rod 5, preferably back of said rod, where they are convenient of access and out of the way of other portions of the typewriting machine. i

A. releasing key 24 is connected ;by a link 25 and arm26-to a-rock shaft 27; the latter extending-from endto. end 'of. the platen frame beneaththe tie rod 5, and having earns 28, which engage the releasing arms 29, of which there are two. 'It will beseen that at each end of the platen frame,- they roll carryingarms 8, 19, are placed near each other, while the release arm. 29, is

placed between arms 8, 19, so that'it may operate both of them with 'a minimum of strain. on the'inechanism. The releasing arms are pivoted-at 30 upon brackets 31 0 fixed upon the tie rod 5. When the release key 24' is depressed from "the position .at

Fig. 4-tofthatat Fig. 5, the cam'28 lifts up one end; of the release lever 29 (thelatter-- pivoted between its ends), and-theam 1532 of the lever' presses the roll shaft T7 1 downwardly. away from the platen. The

forward arm of said lever 29 engages a pin a 33 (projecting from the lug 22 of the roll-' carrying lever 19) and turns said lever 19in 20 a direction to drop the roll 17 from the" platen. -The two release levers 29 are operated simultaneously by the cams 28, drop-' ping all the pressure rolls from the platen. At this time, the releasing levels 29 engage the cylindrical or dead portion of the re leasing shaft 27, and hence the mechanism isdetained mechanically in the released position at Fig. .5. 'Upon ret-urning the key The roll-carrying arm 8 preferably has a guard 34 which may rest against the rock shaft 27 and prevent'undue displacement of the rolls 6 whenever the platen 1 is removed from the machine. The brackets 21 may 40 also have lugs 35 engaging the front side of the rock shaft 27, to preventthe same from springing 1 Around the under side of the platen is a paper guide, deflector or apron 36, recessed near its front edge, at 37, to clear the rolls 17, 'and recessedat its rear edge, at 38, to .clear the rolls 6. Guide forks 39 project downwardly from each end of this deflector 36, to 'engage'the tie rod 5.v Said paper EO-shelf is,thus guided loosely up and down and permitted to fit'itselfto the curvature of the platen. It will be seen at Fig. 4, thatiat points near its front edge, the paper deflector 36 rests upon soft rubber washers 40,-.plaeed upon the front roll shaft 18, whereby the deflectoris yieldingly sup-- ported with its front edge against the platen. The rear edgei.-f thedeflevtor 3G is overhun by the lower edge of the paper shelf 4, and may be provided with cushions 41 to avoid noise when striking the same. The lower portion of the paper shelf is bent forwardly at 42, to form a broad paperguiding rib 43, whereby the paper is dirooted to the bite of the platenand the rear rolls6; and at its lower edge the paper shelf may'be bent down to for'ma narrow rib 44 above ;.the deflector 36. i

Having thns' described myfinvention,

. claim:

1 in a typewriting machine, in combination,'-a platen frame, a platen, a plurality .ofrolls arranged in series, arms supporting said series of rol ls,- springs tending to swing said arms upwardly toward said platen, a releasing lever engaging certain of said arms and adapted toswing the same away from the platen, means .for actuating said releasing lever, and means for limiting the upward movement of said arms when said platen-is removed.'

2. In atypewriting-machine, in combination, a platen frame and platen, a plurality of arms, feed'rollscarried thereby, a releasing lever engaging certain of said arms to swing the sa'me simultaneously, a rock shaft having earnsengaging said releasing lever -to actuate the same, and :1 lug engaging said rock shaft and preventing deflectlon thereof.

3. In a typewriting machine, iii-combination, a platen, a plurality of feed roll arms, feed rolls carried thereby, a releasing lever engaging certain of said arms and adapted to swing the same, a curved deflector plate pressed against said platen and supported .by said arms, and means for uiding said deflector in a substantially radial direction with respect to the axis "of said platen.

- 4. In a typewrit-ing machine, the combination with aplaten,ffo-rward and rear feed rolls, shafts on which the rolls are mounted,

oppositely extending arms supporting the shafts, a support on which the arms are hinged to swing from and toward the platen, and springs to pressthe rolls toward the platen, of an operating shaft, a lug extending from one of the arms, and"a releasing lever pivoted intermediate its ends and operatively engaged bysaid shaft, one arm of said lever engaging the lug, and the remain in" arm en a in the o Josite roll-carryin b C h C shaft to cast off both forward and rear rolls.

5. In a typewriting machine, the combination'witha platen, forward and rear feed rolls,- shafts on which the rolls are-mounted, oppositely extending arms carrying the shafts and hinged to swing from and toward the platen, one of said arms having a projecting lag. and springs to press the rolls against the platen. of an operating shaft, :1 releasing lever pivoted intermeiliate its ends and oper'a-tively engaged by said shaft, a pin on the lug engaged by one arm of'the lever, the opposite arm of the lever engaging the opposite roll-carrying shaft to cast off both forward and rear rolls.

(3. In a typewriting machine, the combi; nation with a platen,and forward and rear swing-pressed feed rolls, oppositely extendv nation with a platen, and forward and rear on which the arms are hinged, of.an operating shaft, and a releasing lever pivoted intermediate its ends to a bracket on the rod and operatively engaged by said shaft',-to cast olf both forward and rear rolls. J

7. In a typewriting machine, the combination with a platen, and forward and rear feed rolls, of roll'supporting arms hinged to swing the rolls from and toward the platen, lugs on the arms, stationary bracket arms, springs interposed between the lugs and bracket arms to press the rolls against the platen, washers in which ends of the springs are seated, and regulating screws engaging the washers to control the spring tension. 8. In a 'typewriting machine, the combifeed rolls, of roll-supporting arms hinged to swing the rolls from and toward the platen, lugs on the arms, stationary bracket arms, springs interposed between the lugs and bracket arms to press the rolls against the platen, washers in which the springs are seated, and regulating screws engaging the washers to control the spring tension, the washers having depressions entered by the ends of the screws to prevent displacement.

9. In a typewriting machine, the combination with a platen, and fonward and rear feed rolls, of roll-supporting arms hinged to swing the .rolls from and toward the platen, lugs on the arms, stationary bracket arms, springs interposed between the lugs and bracket arms to press the rolls against the'platen, an operating shaft and a releas- -ing lever operatively engaged by said shaft to cast off both forward and'rear feed rolls.

10. In a typewriting machine, the combinatlon with a platen, forward .and rear sprin, -pressed feed rolls, and oppositely extending-arms supporting the feed rolls and hinged to swing from and toward the platen, of a release key, a lever pivoted intermediate its ends and operated by the release key to cast off both forward and rear rolls, and a beak on the lever guided by one of the rollsupporting arms.

11. In a typewriting machine, the combination with a platen, forward and rear series of spring-pressed feed rolls, shafts on which the feed rolls aremounted, swinging arms in which the shafts are supported, and casting off and restoring mechanism for the rolls, of a paper deflector beneath the platen, washers on one of the roll-carrying shafts engaging the deflector to hold it against the platen, and guides to control the movement of the deflector from and toward the platen as the rolls are cast off and restored.

12. In a typewriting machine, the combination with aplaten, and platen frame having a centrally located tie rod, forward and.

rear series of feed rolls, and aims supporting the feed rolls, of a tension device including stationary supports lying on one side of and close to the tie rod, lugs on the respective roll-carrying arms, located adjacent the supports, and springs interposed between the lugs and supports to press the rolls toward the platen. 13. In a typewriting' machine, the combination with a platen, forward and rear series of spring-pressed feed rolls, and rocking arms supporting the rolls, of casting off and restoring mechanism including an op erating shaft, stops on certain of the arms engaging the operating shaft to arrest the throw of the arms, and stationary lugs engaging the shaft intermediate the stops to prevent its springing. 14. In a typewriting machine, the comb nation with a platen and a feed'roll to run thereon, of a shaft or axle on whichthe feed roll is mounted, means for guiding the shaft and pressing it towardthe platen, washers 15. In a typewriting machine, the combinationwith a platen and a feed roll to run thereon, ofa shaft or axle on which the feed roll is mounted, means for guiding the shaft and pressing it toward the platen, washers on said shaft, a movable guide or deflector curving around the under side of the platenand bearing upon, said washers, whereby said deflector is supported, means to guide the deflector in its movements relativel to the platen, said guiding means including forks upon the ends of the deflector, and a fixed rod engaged by the forks.

16. The combinationwith a .platen and a platen frame having a fixed rod, sets of arms pivoted on said rod and extending forwardly and rearwardly therefrom, and rolls carried on said arms, brackets fixed on said rod, springs between said brackets and said arms, one spring for each arm, and means for adjusting the tension of the springs independently; each spring in the form of a compression coil-having at one end a cap upon which bears a tension-adjusting screw; the screw fitted to a depression in the cap to prevent displacement thereof.

, WILLIAM F HELMOND.

Witnesses:

N. M. BYORKMAN, LYMAN D. BROUGHTON.

Copies ofthis patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

' Washington, 1),. 03% v 

